Earthquakes in Costa Rica — September 2026
3 earthquakes were recorded in Costa Rica during September 2026, an average of 0.1 per day.
2 reached magnitude 4 or above and 2 reached magnitude 5 or above. The average focal depth was 9 km.
The month's largest event in Costa Rica was a magnitude 5.6 earthquake near Tamarindo, Costa Rica on 30 September 2026 at 21:55 UTC. A magnitude 5.6 earthquake radiates roughly 3,788 tons of TNT equivalent in seismic energy.
That is close to the Costa Rica monthly average of 3 events over the period we cover, and up from the 2 recorded the previous month.
100% of events here are shallow (under 70 km), 0% intermediate (70–300 km) and 0% deep-focus (over 300 km). Almost everything here is crustal. That is characteristic of transform faulting or continental deformation rather than subduction — and it means shaking at the surface is strong for the magnitudes involved.
By band, the catalogue holds 1 in the magnitude 3 range, 2 in the magnitude 5 range.
The month's largest events were M5.6 near Tamarindo, Costa Rica on 30 September at 8 km; M5.0 near Quepos, Costa Rica on 10 September at 10 km; M3.9 near Corredor, Costa Rica on 18 September at 10 km.
That is close to the 3 events Costa Rica averages per month across the 21 months on record.
Largest earthquakes in Costa Rica, September 2026
3 events listed below, newest first. Times are UTC. Click any column header to re-sort.
| Time (UTC) | Mag | Location | Depth (km) | Country | Details |
|---|---|---|---|---|---|
| 5.6 | Tamarindo, Costa Rica | 8.0 | Costa Rica | View details View | |
| 5.0 | Quepos, Costa Rica | 10.0 | Costa Rica | View details View | |
| 3.9 | Corredor, Costa Rica | 10.0 | Costa Rica | View details View |
Frequently asked questions
How many earthquakes hit Costa Rica in September 2026?
3 earthquakes were recorded in Costa Rica during September 2026, of which 2 were magnitude 4 or above.
What was the biggest earthquake in Costa Rica in September 2026?
A magnitude 5.6 event near Tamarindo, Costa Rica on 30 September 2026.
Other months in Costa Rica
Magnitudes for September 2026 reflect the current USGS review status and may have been revised since first publication. See our guides on the magnitude scale, focal depth and why earthquakes cluster.